Was drafting Brandon Marshall a mistake?

I drafted him in my league, but I am not sure whether or not I made the right decision. I feel uncomfortable about his QB situation and with this whole stabbing incident that I am tempted to get rid of him, but I really don't know how much I would be able to get for him right now, so I think I'll hold onto him. I have pretty good depth at WR, just 3 out of 5 of them have question marks and they are Marshall, Sidney Rice, and Plaxico Burress.